diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b6c1ed5..827bc5a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1 +1,8 @@
 # Rules for contributing
+
+## Pull-request rules
+	- Create an issue before adding a new feature.
+	- Make actual quality PRs, no +1 etc.
+
+## General format rules
+	- Use 4 spaces for indentation